Hello yajdam and thanks for the help.
None of both worked. It's curious. With the apk I donwloaded from Legend, it now loads until "Initializing game files", but I got an error telling me BM cannot find the licence file...It's only for VIPs am I right ?
When using a sign version of the apk it fully loads the game.
I turned signature check off. What may I be missing ?
Yes, you are right, the version in Legend post it just for VIP and I didn't notice you weren't. Sorry for that.
But It was a good thing your tried it anyway. That confirmed that was nothing wrong with your system.
The "turn signature check off" option in LuckyPatch only works with the unsign version.
Since you already have root, I advice you to forget the sign version because the unsign one is back in the free section and using a google account is way more reliable.
So try the latest's unsign free version and report back here (even if it is just to say "success" it still helps the devs).
If you didn't make any changes to your system (root+LuckyPatch) I believe (this time) it should install without any issues, although I haven't tried it myself yet.
Good luck!